Which of the following is least likely to produce genetic variation in the offspring of an indivdual? (1 point)
1. independent assortment of chromosomes during meiosis that creates a new combination of alleles in the gametes
2. a cross over event during meiosis that creates a new combination of alleles in the gametes
3. the random fertilization of an egg cell by a sperm cell during sexual reproduction
4. a DNA replication error caused by DNA polymerase in a body cell of the individual